The BANSHEE 100 Series features accessories like an A2 flash hider, mil-spec charging handle, and a CMMG RML7 M-LOK handguard. Chambered in 5.7x28mm, this upper group is ready for your next AR build and works with either CMMG Mk57 lowers or Mk4/mil-spec AR15 lower receivers.
Mk57 lower groups accept FN FiveSeven-style 5.7x28 magazines, and features a unique magazine release. Mk4/AR15 lower groups work when used with CMMG 5.7 conversion magazines.
All of our Upper Groups come complete with BCG.
All CMMG products come with our Lifetime Quality Guarantee.
SPECS
| PLATFORM | MK57 |
| CALIBER | 5.7X28MM (FN), 5.7X28MM |
| OPERATING SYSTEM | RADIAL DELAYED BLOWBACK |
| BARREL LENGTH | 8 |
| BARREL TWIST | 1:9 |
| BARREL CONTOUR | MT |
| BARREL MATERIAL | 4140CM, SBN |
| BARREL TWIST | 1:9 |
| MUZZLE DEVICE | CMMG A2 COMPENSATOR |
| MUZZLE THREAD | 1/2 X 28 |
| GAS PORT LOCATION | N/A |
| GAS BLOCK | N/A |
| UPPER RECEIVER | FORGED 7075-T6 AL M4 TYPE UPPER |
| HAND GUARD | CMMG RML7 M-LOK |
| FINISH | HARD COAT ANODIZED RECEIVERS AND HAND GUARD (CAN BE UPGRADED TO CERAKOTE) |
| CHARGING HANDLE | CMMG MIL-SPEC |
